How many days are there between solar terms and solar terms?

Solar terms are the collective name of festivals and the spirit of China. Generally, the fluctuation between a node and a gas is around 15 days, which is a node or gas of 15 days and a half by default. For example, long summer is a festival, after long summer is a small man, and a small man is loyal. A knot and then a breath. The interval is half a month.